So I scored a bread bin Commodore 64, but unfortunately it looks to be – at least thus far – a dud. It powers up fine, but I can’t tune the sucker in. I did some research and found to my surprise, that the C64 has a fuse on the board which – if busted – can cause this exact problem. Luckily I own three C64’s, and two of them are bread bins, so the obvious troubleshooting step was to swap fuses over. Sounds good in theory, but it didn’t fix the problem. I can definitely see that the TV ‘almost’ tunes the 64 in, there is a point where the snow changes to an almost signal (a black screen with what looks like a really messed up V-hold/H-hold flickering image of the C64 start screen) but I can’t do any better than that.
It could simply be that the machine is fucked, but I’m desperately hoping it’s salvageable as I hate to let a 64 go to the grave. There is some shielding over a part of the board where the RF port comes in, I’m wondering if it’s worth tinkering in there but I doubt it. I’m open to suggestions people! Having a duplicate working 64 is bound to make troubleshooting easier, but not if I don’t know where to go from here. If nothing else, this will serve as an informative journey through the innards of a C64.
I had someone suggest there might be some kind of dial or something on the board where you can adjust the RF, but I’m not seeing it. Off to Google I go…